CN108372411B - Flexible locking and positioning device and positioning method for blade air film hole machining - Google Patents
Flexible locking and positioning device and positioning method for blade air film hole machining Download PDFInfo
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- CN108372411B CN108372411B CN201611183620.9A CN201611183620A CN108372411B CN 108372411 B CN108372411 B CN 108372411B CN 201611183620 A CN201611183620 A CN 201611183620A CN 108372411 B CN108372411 B CN 108372411B
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- positioning
- flexible locking
- blade
- air film
- film hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material
Abstract
The invention provides a flexible locking and positioning method for processing a blade air film hole, which is technically characterized by comprising the following steps of: the flexible locking structure comprises a flexible locking structure and a positioning structure, wherein the flexible locking structure comprises a slab bridge and a clamping seat, a mortise is arranged on the clamping seat, the slab bridge and the clamping seat are flexibly connected in a floating manner through jackscrews and screws, the positioning structure comprises a positioning wall, a limiting part is arranged at the upper part of the inner side wall of the positioning wall, a first reference surface, a second reference surface and a third reference surface are respectively arranged on the limiting part, convex parts are respectively arranged at the middle part and the lower part of the inner side wall of the positioning wall, reference ball heads are respectively arranged on the convex parts, an end cover is arranged on the outer side wall of the positioning wall, and a base is; according to the invention, through flexible connection of the flexible locking structure, flexible conversion from six-point reference to process reference of the blade body of the turbine blade is realized, machining errors caused by blade tenon deviation are eliminated, reliable locking and positioning of the blade are realized, and the flexible locking device is simple in clamping and easy to operate.
Description
Technical Field
The invention relates to the technical field of special machining, in particular to a flexible locking device for machining a blade air film hole and a positioning method.
Background
The turbine is the most thermally and mechanically loaded component in an aircraft engine, wherein the turbine blade is particularly harsh in working environment and is subjected to high-temperature and high-pressure gas impact after combustion in an engine cycle, and the performance of the engine is greatly dependent on the inlet temperature of the turbine. In order to ensure that the components can still work safely and reliably when the temperature of the working environment exceeds the melting point of the material, the components need to be cooled continuously. The film hole cooling technology can greatly improve the performance of the engine, and simultaneously, higher requirements are put forward on the film hole processing technology.
With the development of aero-engines, higher and higher requirements are put forward on materials, structures and processes of turbine blades, the requirements on the machining quality of air film holes are higher and higher, and the method for positioning the tenon directly restricts the further improvement of the machining precision of the air film holes. At present, in the prior art, a tenon positioning and clamping method is adopted for machining the air film hole of the turbine blade, and the machining precision and quality of the tenon directly influence the machining level of the air film hole. The tenon processing is based on the six-point datum of the cast blade body, broaching or milling processing is performed, the error generated by converting the six-point datum of the cast blade body into the tenon datum is directly accumulated in the gas film hole processing precision, great influence is caused on the gas film hole position precision, certain error exists in the tenon processing, and the blade tenon is reused for positioning processing, so that the hole position precision of the gas film hole is directly influenced, and the cooling capacity of a turbine component is further influenced. Meanwhile, the tenon air vent deviation caused by casting defects enables the tenon machining of each blade to be correspondingly adjusted relative to a six-point reference, the adjustment amount of the tool for the tenon of each blade is required to be adjusted, the adjustment workload of the tool is large, the positioning precision is difficult to guarantee, and the influence on the machining of the air film hole is large
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a flexible locking and positioning method for processing a blade air film hole.
A flexible locking and positioning device for processing a blade air film hole comprises a flexible locking structure and a positioning structure.
Furthermore, the flexible locking structure comprises a plate bridge and a clamping seat, a mortise is arranged on the clamping seat, and the plate bridge and the clamping seat are flexibly connected through jackscrews and screws in a floating mode.
Furthermore, the positioning structure comprises a positioning wall, a limiting part is arranged on the upper portion of the inner side wall of the positioning wall, a first reference surface, a second reference surface and a third reference surface are respectively arranged on the limiting part, convex parts are respectively arranged in the middle and the lower portion of the inner side wall of the positioning wall, reference ball heads are respectively arranged on the convex parts, an end cover is arranged on the outer side wall of the positioning wall, and a base is arranged at the bottom of the positioning wall.
Furthermore, a jackscrew is arranged in the end cover, and the other end of the jackscrew is connected with the reference ball head.
Further, the jackscrew in the end cover is transversely arranged.
Further, a pressing plate is arranged at the top of the positioning structure.
Further, the number of screws is 4, and the number of jackscrews is 4.
Further, the number of the reference ball heads is 6.
A flexible locking and positioning method for processing a blade air film hole comprises the following steps:
firstly, flexibly connecting a clamping seat with a plate bridge through a screw and a jackscrew;
secondly, matching the blade with the mortise on the clamping seat, and locking and clamping;
thirdly, mounting the assembled flexible locking structure on a positioning structure, so that three reference surfaces of the plate bridge are completely attached and locked with a first reference surface, a second reference surface and a third reference surface in the positioning structure respectively;
fourthly, the floating blade is leaned against each reference ball head of the positioning structure, and the blade is ensured to be in complete contact with each reference ball head;
fifthly, the jackscrew is rotated to the position in sequence and is fit with the bottom surface of the clamping seat, so that the reference conversion is realized;
sixthly, sequentially locking the screws, and placing a pressing plate on the top of the positioning structure;
and seventhly, taking out the flexible locking structure to finish positioning.
Further, the number of screws is 4, the number of jackscrews is 4, and the number of benchmark bulbs is 6.
The invention has the advantages that:
1. through the flexible connection of the flexible locking structure, the flexible conversion from the six-point datum to the process datum of the blade body of the turbine blade is realized, the machining error caused by the deviation of the blade tenon is eliminated, the reliable locking and positioning of the blade are realized, and the clamping is simple and easy to operate;
2. removable and adjustable location structure of benchmark bulb can adjust the location benchmark in certain extent to when the benchmark bulb wearing and tearing, convenient the change, easy operation prolongs base life, reduction in manufacturing cost.
Drawings
FIG. 1 is a schematic structural diagram of a flexible locking structure of the present invention;
FIG. 2 is a schematic structural diagram of a positioning structure of the present invention;
fig. 3 is a bottom view of the positioning structure.
The labels in the figures are:
1. slab bridge
2. Jackscrew
3. Clamping seat
4. Screw nail
5. Positioning wall
6. Reference ball head
7. First reference plane
8. Second reference plane
9. Third reference plane
10. Convex part
11. Base seat
12 end caps.
Detailed Description
In order that the invention may be more clearly understood, the following detailed description of the embodiments of the invention is given with reference to the accompanying drawings.
Example 1
As shown in fig. 1-3, a flexible locking and positioning device for processing a blade air film hole comprises a flexible locking structure and a positioning structure. The flexible locking structure comprises a plate bridge 1 and a clamping seat 3, a mortise is arranged on the clamping seat 3, and the plate bridge 1 and the clamping seat 3 are flexibly connected through a jackscrew 2 and a screw 4 in a floating mode. The positioning structure comprises a positioning wall 5, a limiting part is arranged on the upper part of the inner side wall of the positioning wall 5, a first reference surface 7, a second reference surface 8 and a third reference surface 9 are respectively arranged on the limiting part, convex parts 10 are respectively arranged in the middle and the lower part of the inner side wall of the positioning wall 5, reference ball heads 6 are respectively arranged on the convex parts 10, an end cover 12 is arranged on the outer side wall of the positioning wall 5, and a base 11 is arranged at the bottom of the positioning wall 5.
A flexible locking and positioning method for processing a blade air film hole comprises the steps that firstly, a clamping seat 3 is flexibly connected with a plate bridge 1 through a screw 4 and a jackscrew 2; secondly, matching the blade with the mortise on the clamping seat 3, and locking and clamping; thirdly, mounting the assembled flexible locking structure on a positioning structure, so that three reference surfaces of the slab bridge 1 are completely attached and locked with a first reference surface 7, a second reference surface 8 and a third reference surface 9 in the positioning structure respectively; fourthly, the floating blade is leaned against each reference ball head 6 of the positioning structure, and the blade is ensured to be in complete contact with each reference ball head 6; fifthly, the jackscrew 2 is rotated in place in sequence and is fit with the bottom surface of the clamping seat 3, so that the reference conversion is realized; sixthly, sequentially locking the screws 4, and placing a pressing plate on the top of the positioning structure; and seventhly, taking out the flexible locking structure to finish positioning.
Example 2
As shown in fig. 1-3, a flexible locking and positioning device for processing a blade air film hole comprises a flexible locking structure and a positioning structure. The flexible locking structure comprises a plate bridge 1 and a clamping seat 3, wherein a tongue-and-groove is formed in the clamping seat 3, and the plate bridge 1 and the clamping seat 3 are flexibly connected through 4 jackscrews 2 and 4 screws 4 in a floating mode. The positioning structure comprises a positioning wall 5, the upper portion of the inner side wall of the positioning wall 5 is provided with a limiting portion, the limiting portion is provided with a first reference surface 7, a second reference surface 8 and a third reference surface 9 respectively, the middle portion and the lower portion of the inner side wall of the positioning wall 5 are provided with convex portions 10, 6 reference ball heads 6 are arranged on the convex portions 10, the outer side wall of the positioning wall 5 is provided with an end cover 12, a jackscrew 2 is arranged in the end cover 12, the other end of the jackscrew 2 is connected with the reference ball heads 6, the jackscrew 2 in the end cover 12 is transversely arranged, the bottom of the positioning wall 5 is provided with a base 11, and the top of the positioning.
A flexible locking and positioning method for processing a blade air film hole comprises the steps that firstly, a clamping seat 3 is flexibly connected with a plate bridge 1 through 4 screws 4 and 4 jackscrews 2; secondly, matching the blade with the mortise on the clamping seat 3, and locking and clamping; thirdly, mounting the assembled flexible locking structure on a positioning structure, so that three reference surfaces of the slab bridge 1 are completely attached and locked with a first reference surface 7, a second reference surface 8 and a third reference surface 9 in the positioning structure respectively; fourthly, the floating blade is leaned against 6 reference ball heads 6 of the positioning structure, and the blade is ensured to be completely contacted with the 6 reference ball heads 6; fifthly, the jackscrew 2 is rotated in place in sequence and is fit with the bottom surface of the clamping seat 3, so that the reference conversion is realized; sixthly, sequentially locking the screws 4, and placing a pressing plate on the top of the positioning structure; and seventhly, taking out the flexible locking structure to finish positioning.
The reference ball heads 6 can be replaced, the positioning structure can be adjusted, the pressure generated by 4 jackscrews and the pulling force generated by 4 screws enable the force between the plate bridge 1 and the clamping seat 3 to be balanced and to be in a stable state, and the flexible structure is converted from flexibility to rigidity.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a processing of blade air film hole is with flexible locking positioner which characterized in that: including flexible locking structure and location structure, location structure includes the location wall, and the upper portion of the inside wall of location wall is provided with spacing portion, is provided with first reference surface and second reference surface and third reference surface respectively in the spacing portion, and the middle part and the lower part of the inside wall of location wall all are provided with the convex part, are provided with the benchmark bulb on the convex part respectively, and the lateral wall of location wall is provided with the end cover.
2. The flexible locking and positioning device for processing the blade air film hole as claimed in claim 1, wherein: the flexible locking structure comprises a plate bridge and a clamping seat, wherein a mortise is arranged on the clamping seat, and the plate bridge and the clamping seat are flexibly connected through jackscrews and screws in a floating mode.
3. The flexible locking and positioning device for processing the blade air film hole as claimed in claim 1, wherein: the bottom of the positioning wall is provided with a base.
4. The flexible locking and positioning device for processing the blade air film hole as claimed in claim 1, wherein: a jackscrew is arranged in the end cover, and the other end of the jackscrew is connected with the reference ball head.
5. The flexible locking and positioning device for processing the blade air film hole as claimed in claim 4, wherein: the jackscrew in the end cover is transversely arranged.
6. The flexible locking and positioning device for processing the blade air film hole as claimed in claim 1, wherein: the top of the positioning structure is provided with a pressing plate.
7. The flexible locking and positioning device for processing the blade air film hole as claimed in claim 2, wherein: the number of screws is 4, and the number of jackscrews is 4.
8. The flexible locking and positioning device for processing the blade air film hole as claimed in claim 3, wherein: the number of the reference ball heads is 6.
9. A flexible locking and positioning method for processing a blade air film hole is characterized by comprising the following steps:
firstly, flexibly connecting a clamping seat with a plate bridge through a screw and a jackscrew;
secondly, matching the blade with the mortise on the clamping seat, and locking and clamping;
thirdly, mounting the assembled flexible locking structure on a positioning structure, so that three reference surfaces of the plate bridge are completely attached and locked with a first reference surface, a second reference surface and a third reference surface in the positioning structure respectively;
fourthly, the floating blade is leaned against each reference ball head of the positioning structure, and the blade is ensured to be in complete contact with each reference ball head;
fifthly, the jackscrew is rotated to the position in sequence and is fit with the bottom surface of the clamping seat, so that the reference conversion is realized;
sixthly, sequentially locking the screws, and placing a pressing plate on the top of the positioning structure;
and seventhly, taking out the flexible locking structure to finish positioning.
10. The flexible locking and positioning method for processing the blade air film hole as claimed in claim 9, wherein: the number of screws is 4, and the number of jackscrews is 4, and the number of benchmark bulb is 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611183620.9A CN108372411B (en) | 2016-12-20 | 2016-12-20 | Flexible locking and positioning device and positioning method for blade air film hole machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611183620.9A CN108372411B (en) | 2016-12-20 | 2016-12-20 | Flexible locking and positioning device and positioning method for blade air film hole machining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108372411A CN108372411A (en) | 2018-08-07 |
| CN108372411B true CN108372411B (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611183620.9A Active CN108372411B (en) | 2016-12-20 | 2016-12-20 | Flexible locking and positioning device and positioning method for blade air film hole machining |
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| CN (1) | CN108372411B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112496485B (en) * | 2020-11-16 | 2022-08-09 | 中国航发沈阳黎明航空发动机有限责任公司 | Positioning fixture for machining air film hole in shielding part of duplex block-cast guide blade and machining method of air film hole |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0424593D0 (en) * | 2004-11-06 | 2004-12-08 | Rolls Royce Plc | A component having a film cooling arrangement |
| CN100460147C (en) * | 2007-07-27 | 2009-02-11 | 北京航空航天大学 | Flexible multipoint supported system in use for digital controlled machining laminae |
| CN102689217B (en) * | 2012-05-31 | 2014-06-18 | 北京航空航天大学 | Device for correcting double-shaft micro-deformation blade reference |
| CN103056687B (en) * | 2012-12-28 | 2015-01-21 | 北京航空航天大学 | Benchmark repair clamp for vane |
| CN203599908U (en) * | 2013-11-21 | 2014-05-21 | 中国南方航空工业(集团)有限公司 | Machining clamp for turbine work blade |
| CN105965289A (en) * | 2016-06-15 | 2016-09-28 | 广东工业大学 | Flexible clamp used for aviation blade |
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2016
- 2016-12-20 CN CN201611183620.9A patent/CN108372411B/en active Active
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| CN108372411A (en) | 2018-08-07 |
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